ssd 512gb QLC debuts: low performance, reliability slag? But it must be it that replaces HDDsadmin
ssd 512gb QLC debuts: low performance, reliability slag? But it must be it that replaces HDDs
bulk ssd hard drives SSD OEMssd 512gb nand flash-based SSD hard drives are now increasingly accepted SSD 512gb + 8618750919058, becoming one of the must-have accessories for installationssd 512gb , HDD mechanical disk is becoming more and more unpopular, if it is not the past two years memory chip experienced a two-year price increase, In 2018, the market should be able to popularize 480-512GB of SSD, people’s demand for SSD capacity is also increasing, and after TLC dominated the SSD market, QLC flash memory also appeared.”
QLC flash memory compared with TLC flash memory performance, the write performance was further degraded
Specific to the performance, Micron has made a detailed interpretation, first of all, the reading speed is not much worse than the TLC flash memory, both of which can reach a speed of 540MB/s in the SATA interface, and the QLC flash memory is mainly worse than the write speed, because its natural P/E programming time is longer than MLC and TLC, the speed is slower, the continuous write speed is reduced from 520MB/s to 360MB/s, and the random performance is reduced from 9500 IOPS to 5000 IOPS, with a loss of nearly half. At the same time, the MTTF trouble-free interval time has also dropped from 3 million hours to 2 million hours,ssd 512gb and the performance and reliability have not run.
3D stack technology, QLC flash memory has encountered a good time
Just as TLC flash memory was tested when it first came out, performance and reliability decline is an inevitable disadvantage of QLC flash memory, should we be worried about QLC flash memory, or reject QLC flash memory? Intuitively, it should be like this, but we also need to understand that today’s NAND flash memory has entered the 3D NAND era earlier, which is different from the 2D NAND era, and the QLC flash memory in the 3D NAND era is also different from the QLC flash memory in the 2D NAND era, which is determined by the technical route of both sides.ssd hard drives
In the 2D NAND flash memory era, manufacturers need to continuously improve the NAND process process in order to pursue the improvement of NAND capacity, so NAND has continuously entered the 30nm, 20nm and 10nm era in the past few years, which is like the processor process is constantly upgraded, the benefit is to improve the transistor density, increase the NAND capacity, reduce the cost, However, the improvement of the NAND process means that the layer of silicon dioxide used to block electrons is getting thinner and thinner, resulting in poorer reliability, and the frequency of MLC, TLC, and QLC flash memory crossing the silica layer is increasing step by step, which will also lead to thinning of the oxide layer, which is why the P/E life is constantly decreasing.
but in the 3D NAND era, the increase in NAND capacity depends not on the miniature process process, but on the number of layers in the stack, so the process becomes unimportant, NAND manufacturers can even use the previous process, such as Samsung’s original 3D NAND flash memory is still using the 40nm process, the reliability is much higher than the 20nm, 10nm level process.
The biggest temptation of QLC flash memory is that the future capacity is greater, the desktop market to popularize 10TB capacity will depend on it, the enterprise market will even do 100TB capacity, completely do not lose HDD hard disk, while the continuous performance of QLC hard disk, random performance is better than HDD hard disk, power consumption, noise and other aspects of the same no comparison, is really possible to replace HDD hard disk choice. ssd hard drives SSD OEMssd 512gb